This sector includes, but is not limited to, oil drilling and royalty programs, gold, silver, copper and coal mining, real estate, medical technology, movies, communications, partnerships into a wide variety of ventures. They almost always begin with a cold call. In addition, those agencies mandated with regulating this sector, do not normally respond to a possible investment scam until weeks, months or even years after someone files a complaint! By the time a regulatory agency responds to a complaint, the people who took your money are long gone! FYI: Regulatory agencies such as the SEC and State Securities do not recover your money!